add rules for building

php/.gitlab-ci.yml

@@ -5,6 +5,10 @@
     - buildah bud --storage-driver=${STORAGE_DRIVER} -t ${FQ_IMAGE_NAME}:php${PHP_VERSION} -f php/Dockerfile.php${PHP_VERSION} .
     - echo "$CI_REGISTRY_PASSWORD" | buildah login -u "$CI_REGISTRY_USER" --password-stdin "$CI_REGISTRY"
     - buildah push ${FQ_IMAGE_NAME}:php${PHP_VERSION}
+  rules:
+    - changes:
+        - php/**
+    - if: '$CI_PIPELINE_SOURCE == "schedule"'
 
 build_php82:
   <<: *build_template